High severity7.5GHSA Advisory· Published May 7, 2026· Updated May 7, 2026
CVE-2026-41643
CVE-2026-41643
Description
GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP where a malformed BGP UPDATE message can trigger a runtime error: index out of range panic. This occurs during the processing of 4-byte AS attributes when the message structure causes an internal slice index shift that is not properly handled. This issue has been patched in version 4.3.0.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/osrg/gobgp/v4Go | < 4.3.0 | 4.3.0 |
Affected products
3Patches
Vulnerability mechanics
References
4- github.com/osrg/gobgp/releases/tag/v4.3.0nvdPatchRelease NotesWEB
- github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2qnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-8rxh-r2p6-7f2qghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-41643ghsaADVISORY
News mentions
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